[ARC5] BC-348Q CW Oscillator Question

J Mcvey ac2eu at yahoo.com
Tue Jan 12 21:26:04 EST 2016


If that's what the circuit DC path shows, and the CW osc works,I wouldn't worry about it. Probably is a typo. 
I was never fond of wholesale resistance measurements as a troubleshooting tool anyway. Are you just poking around or is there an issue with it?
 

    On Tuesday, January 12, 2016 6:50 PM, Mark K3MSB <mark.k3msb at gmail.com> wrote:
 

 Gentlemen:

I'm restoring my BC-348Q receiver.   The resistance measurements I get for the Plate (Pin 6) of the 2nd Det / CW Oscillator tube (V233) are way off.

Table D from AN-08-10-112:

CW OSC OFF:  500K
CW OSC ON:   5M.

My measurements:

CW OSC OFF:  Infinite
CW OSC ON:   600K

>From sketching out the DC circuit path from V233 Pin 6, I come up with :

CW OSC OFF:  Infinite
CW OSC ON:   567K

I'm wondering if the manual has the values flipped?

73 Mark K3MSB

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